Combination ph/orp Sensor

Transcription

1 Instruction Manual PN /rev.G October 2005 Model 389 Combination ph/orp Sensor

2 ESSENTIAL INSTRUCTIONS READ THIS PAGE BEFORE PROCEEDING! Rosemount Analytical designs, manufactures, and tests its products to meet many national and international standards. Because these instruments are sophisticated technical products, you must properly install, use, and maintain them to ensure they continue to operate within their normal specifications. The following instructions must be adhered to and integrated into your safety program when installing, using, and maintaining Rosemount Analytical products. Failure to follow the proper instructions may cause any one of the following situations to occur: Loss of life; personal injury; property damage; damage to this instrument; and warranty invalidation. Read all instructions prior to installing, operating, and servicing the product. If this Instruction Manual is not the correct manual, telephone and the requested manual will be provided. Save this Instruction Manual for future reference. If you do not understand any of the instructions, contact your Rosemount representative for clarification. Follow all warnings, cautions, and instructions marked on and supplied with the product. Inform and educate your personnel in the proper installation, operation, and maintenance of the product. Install your equipment as specified in the Installation Instructions of the appropriate Instruction Manual and per applicable local and national codes. Connect all products to the proper electrical and pressure sources. To ensure proper performance, use qualified personnel to install, operate, update, program, and maintain the product. When replacement parts are required, ensure that qualified people use replacement parts specified by Rosemount. Unauthorized parts and procedures can affect the product s performance and place the safe operation of your process at risk. Look alike substitutions may result in fire, electrical hazards, or improper operation. Ensure that all equipment doors are closed and protective covers are in place, except when maintenance is being performed by qualified persons, to prevent electrical shock and personal injury. DANGER HAZARDOUS AREA INSTALLA- TION This sensor is not Intrinsically Safe. or Explosion Proof. Installations near flammable liquids or in hazardous area locations must be carefully evaluated by qualified on site safety personnel. To secure and maintain an intrinsically safe installation, an appropriate transmitter/ safety barrier/sensor combination must be used. The installation system must be in accordance with the governing approval agency (FM, CSA or BASEEFA/CENELEC) hazardous area classification requirements. Consult your analyzer/transmitter instruction manual for details. Proper installation, operation and servicing of this sensor in a Hazardous Area Installation is entirely the responsibility of the user. CAUTION SENSOR/PROCESS APPLICATION COMPATIBILITY The wetted sensor materials may not be compatible with process composition and operating conditions. Application compatibility is entirely the responsibility of the user. Emerson Process Management Rosemount Analytical Inc Barranca Parkway Irvine, CA USA Tel: (949) Fax: (949) About This Document This manual contains instructions for installation and operation of the Model 389 Combination ph/orp sensor. The following list provides notes concerning all revisions of this document. Rev. Level Date Notes 0 2/01 This is the initial release of the product manual. The manual has been reformatted to reflect the Emerson documentation style and updated to reflect any changes in the product offering. A 1/02 Revised wiring diagram on page 7. B 5/02 Updated drawings on pages 5, 6, & 13. C 8/02 Added drawing , rev.d. D 6/02 Revised drawing on page 7. E 3/04 Updated drawings on pages 4, 15, 16; added new wiring drawing on page 18. G 10/05 Updated registration marks of Tefzel and Viton on page 1; PN is replaced with new PN on Figure 2-2, page 5.

3 MODEL 389 TABLE OF CONTENTS MODEL 389 COMBINATION ph/orp SENSOR TABLE OF CONTENTS Section Title Page 1.0 DESCRIPTION AND SPECIFICATIONS Features and Applications Performance and Physical Specification Ordering Information Unpacking and Inspection Mounting Electrical Installation START UP AND CALIBRATION Sensor Preparation Model 389 ph Calibration Model 389 ORP MAINTENANCE Electrode Cleaning Automatic Temperature Compensator Model 389 ORP TROUBLESHOOTING Troubleshooting RETURN OF MATERIAL i

4 MODEL 389 TABLE OF CONTENTS TABLE OF CONTENTS CONT D LIST OF TABLES Number Title Page 3-1 ORP of Saturated Quinhydrone Solution (In Millivolts) R o and R 1 Values for Temperature Compensation Elements Temperature vs Resistance of Auto T.C. Elements Troubleshooting Model 389 Replacement Parts and Accessories LIST OF FIGURES Number Title Page 1-1 Pressure /Temperature Limitations Dimensional Drawing Submersion Installations Flow Through and Insertion Installations Model 389 with Insertion Mounting Adapter PN Wiring Details Model With and Without J-Box PN Wiring Model to Models 1054ApH/ORP-54 and 2054pH Wiring Model to Models 2081pH-05 and 1054pH/ORP Wiring Details Model For Use With J-Box (PN ) For Remote Preamp (PN ) Wiring Details Model /51 For Use With J-Box (PN ) For Remote Preamp (3K TC) Wiring Details Model For Use With Models 1054ApH/ORP-07, 1054BpH/ORP-07, and 2054pH Wiring Model ( ) to Model Wiring Details Model /51 For Use With and Without J-Box (PN ) Wiring Model to Model Wiring Model to Model Through Remote Junction Box Wiring Details Model For Use With Model 1181pH/ORP-43/ Wiring Details Model For Use With Models 54/54e, 81, 3081, 4081,... and 5081 Analyzers/Transmitters Wiring Details Model (Pt 100 RTD) For Use With J-Box and Remote Preamp (PN ) to Models 54/54e, 81, 3081, 4081,... and 5081 Analyzers/Transmitters Wiring Details Model (Pt 100 RTD) For Use With Remote Preamp (PN ) Wiring Model to Model Xmt-P-HT ii

5 MODEL 389 SECTION 1.0 DESCRIPTIONS AND SPECIFICATIONS SECTION 1.0 DESCRIPTION AND SPECIFICATIONS DISPOSABLE DESIGN for convenience and economic advantage where minimal troubleshooting and maintenance downtime are of prime importance. RUGGED TEFZEL 1 BODY for maximum chemical resistance; completely sealed to eliminate process intrusion. TRIPLE JUNCTION REFERENCE CELL for longer sensor life in process solutions containing poisoning ions. INTEGRAL PREAMPLIFIER for noise free, long distance transmission of the high impedance ph signal. 1.1 FEATURES AND APPLICATIONS The Rosemount Model 389 Sensor measures the ph or the Oxidation Reduction Potential (ORP) of aqueous solutions in pipelines, open tanks, or ponds. It is suitable for virtually all ph/orp applications where a low cost, high performance, disposable sensor is required. The combination electrode features a peripheral ceramic junction. The triple junction reference cell provides longer life in process solutions containing ammonia, chlorine, cyanides, sulfides, or other poisoning ions. The sensor is housed in a molded, chemically resistant Tefzel 1 body with Viton 1 and EPDM O-rings. Complete encapsulation eliminates process intrusion. The simplified construction, designed with user convenience in mind, does not require electrolyte replenishment or any component replacement. The Rosemount method features an integral preamplifier that converts the high impedance signal into a stable, noise-free signal. This method has become the industry standard for measurement reliability. Installation is easily achieved through the wide variety of mounting configurations. The Model 389 features 1 in. (MNPT) front and rear facing process connections for insertion, submersion, or flow through applications. 1.2 PERFORMANCE & PHYSICAL SPECIFICATIONS Measured Ranges: ph: ACCUGLASS Percent Linearity Over ph Range Option 10 Option ph 94% 94% 2-12 ph 99% 97% ph 97% 98% ph 92% 98% ORP: to mv Wetted Materials: ph: Tefzel 1, glass, ceramic, Viton 1 ORP: Tefzel 1, glass, ceramic, Viton 1, Platinum Accessories: Kynar 3, PEEK, PVC, CPVC, 304 S.S. Process Connections: 1 in. MNPT Integral Cable: Option 01: 25 ft, with integral preamplifier Option 02: 15 ft, for use with remote preamplifier Temperature Compensation: Automatic 0 to 85 C (32 to 185 F) Temperature compensation is not required for 389 ORP when used with Models 1060, 1023 or 1181 ORP Temperature Rating: 0 C to 85 C (32 to 185 F) Maximum Pressure: 790 kpa abs (100 psig) at 65 C Weight/Shipping Weight: 0.45 kg/0.9 kg (1 lb/2 lb) 1 Tefzel and Viton are registered trademarks of DuPont Performance Elastomers. 2 ACCUGLASS is a trademark of Rosemount Analytical. 3 Kynar is a trademark of Pennwalt Inc. 1

6 MODEL 389 SECTION 1.0 DESCRIPTIONS AND SPECIFICATIONS 1.3 ORDERING INFORMATION The Model 389 ph/orp Sensor is housed in a molded Tefzel body with 1 in. MNPT threads suitable for insertion, submersion or flow through installation. The sensor includes a general purpose ph or high ph electrode or a platinum ORP electrode with a triple junction gel filled reference cell. The Model 389 ph is available with or without an integral preamplifier. The Model 389 ORP is available only with an integral preamplifier. Automatic temperature compensation is standard with the Model 389 ph. Temperature measurement is provided with the Model 389 ORP-54. MODEL 389 ph/orp SENSOR CODE PREAMPLIFIER/CABLE (Required Selection) 01 With Integral preamplifier, 25 ft cable (for use with Models 1181, 1054A/B, and 2081 only) 02 For use with remote preamplifier, 15 ft cable CODE COMBINATION ELECTRODE (Required Selection) 10 General Purpose Low Resistivity, GPLR 11 High ph 12 ORP CODE ANALYZER/TC COMPATIBILITY (Required Selection) 50 For Models 1181 (3K TC) 54 For Models 1054A/B, 54, 54e, 1055, 81, 2081, 3081, 4081, 5081, and Xmt; Code 02 only (Pt 100 TC) CODE OPTIONS 62 Cable prepped w/o BNC for wiring to Models 54e, 81,1055, 2081, 3081, 4081, 5081, Xmt (only available w/combination of -02 & -54 options) EXAMPLE FIGURE 1-1. Pressure/Temperature Limitations 2

7 MODEL 389 SECTION 2.0 SECTION UNPACKING AND INSPECTION. Inspect the outside of the carton for any damage. If damage is detected, contact the carrier immediately. Inspect the hardware. Make sure all the items in the packing list are present and in good condition. Notify the factory if any part is missing. If the instrument appears to be in satisfactory condition, proceed to Section 2.2, Mounting. NOTE Save the original packing cartons and materials as most carriers require proof of damage due to mishandling, etc. Also, if it is necessary to return the instrument to the factory, you must pack the instrument in the same manner as it was received. Refer to Section 6 for return instructions. If the sensor is to be stored, the vinyl boot should be filled with ph buffer solution and replaced on sensor tip until ready for use. CAUTION Buffer solution in the vinyl boot may cause skin or eye irritation. WARNING Glass electrode must be wetted at all times (in storage and in line) to maximize sensor life. 2.2 MOUNTING. The sensor has been designed to be located in industrial process environments. Temperature and pressure limitations must not be exceeded at any time. A Caution label regarding this matter is attached to the sensor with the cable. Please do not remove the label. See Figure 2-1. CAUTION Internal electrolyte fill may cause skin or eye irritation Mounting Guidelines: 1. Shake down the sensor to remove any air bubbles that may be present inside the tip of the ph glass. 2. Do not install the sensor on the horizontal. The sensor must be 10 off the horizontal to ensure accuracy. 3. Do not install the sensor upside down. 4. With the standard recessed electrode, air bubbles may become trapped in the sensor end. This problem is most commonly encountered in areas of low flow or during calibration. Shake the probe while immersed in solution to remove bubbles. In most cases, the ph sensor can simply be installed as shipped, and readings with an accuracy of ± 0.2 ph may be obtained. To obtain greater accuracy or to verify proper operation, the sensor must be calibrated as a loop with its compatible analyzer or transmitter Submersion Mounting.The Model 389 Sensor has a 1 in. MNPT process connection at the back of the sensor. Utilizing a standard 1 in. union, the sensor may be mounted to a 1 in. SCH 80 CPVC or PVDF standpipe. Tapered pipe threads in plastic tend to loosen after installation. It is therefore recommended that Teflon 1 tape be used on the threads and that the tightness of the connection be checked frequently to assure that no loosening has occurred. To prevent rain water or condensation from running into the sensor, a weatherproof junction box is recommended (See Figure 2-2). The sensor cable must be run through a protective conduit for isolation from electrical interference or physical abuse from the process. The sensor should be installed within 80 of vertical, with the electrode facing down. The sensor s cable should not be run with power or control wiring Flow Through and Insertion Mounting. The Model 389 Sensor also has a 1 in. MNPT process connection at the front of the sensor for mounting into a 1-1/4 in. tee or the process. See Figure 2-3 for installation configurations. Also see Figure 2-4. NOTE LARGE PIPE WRENCHES MUST NOT BE USED TO TIGHTEN THE SENSOR INTO A FLANGE OR OTHER TYPE OF MOUNT- ING. 1 Teflon is a registered trademark of E.I. dupont de Nemours & Co. 3

8 MODEL 389 SECTION ELECTRICAL. Figures 2-5 thru 2-19 provide the guidelines for wiring the 389 sensor to various Analyzer/Transmitter instruments. To determine which wiring guideline to use, locate the code number of the sensor to be installed. This number is stamped in the body of the sensor. The corresponding wiring guideline selection is identified by the Preamplifier/Cable code (01/02) and the Analyzer/ TC compatibility code (50/51/54). 1. If the cable needs to be extended, use a high quality four conductor shielded instrument cable available from Rosemount Analytical. Refer to Figures 2-5, 2-8, 2-9, 2-10, 2-11 and 2-14 for the appropriate junction box to use and the corresponding wiring details. NOTE If the cable is too long, loop up the excess cable. If the cable has to be shortened, splice and terminate each conductor neatly and make sure that the overall (outermost) drain wire is not shorted out with either of the two inner drain wires (shields). 2. Signal cable should be run in a dedicated conduit (preferably an earth grounded metallic conduit) and should be kept away from AC power lines. For your convenience, a spade lug kit is furnished (in a plastic bag wrapped around the cable). WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH A 4 FIGURE 2-1. Dimensional Drawing

9 MODEL 389 SECTION 2.0 WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH NEMA 4X JUNCTION BOX P.N (WITHOUT PREAMP) P.N FOR USE WITH PREAMP (3K) P.N FOR USE WITH PREAMP (PT100) 2 PIPE MOUNTING BRACK- ET P.N FLEXIBLE CONDUIT IF REQUIRED 1 PIPE BY OTHERS 1 FNPT CPVC UNION P.N MODEL REGULARLY CHECK TO MAKE SURE CONNECTIONS ARE WATER TIGHT. NOTES: UNLESS OTHERWISE SPECIFIED A B FIGURE 2-2. Submersion Installations 5

10 MODEL 389 SECTION /2 x 1 Reducing Bushing 1-1/2 x 1 Reducing Bushing STRAIGHT FLOW SHOWN 1-1/2 Pipe Tee 1-1/2 Pipe Tee ANGLE FLOW SHOWN 1-1/2 x 1 Reducing Bushing PIPE Y SHOWN FLOW NOTES: Valves and fittings by others. Mount the sensor at least 10 from horizontal. 1-1/2 Pipe Y FIGURE 2-3. Flow Through and Insertion Installations MILLIMETER INCH B FIGURE 2-4. Model 389 with insertion mounting adapter P/N

11 MODEL 389 SECTION Wiring. The Model 389 has a built-in preamplifier (except option 02) and comes standard with a seven conductor, shielded cable. The cable should be handled carefully and kept dry and free of corrosive chemicals at all times. Extreme care should be used to prevent it from being twisted, damaged, or scraped by rough, sharp edges or surfaces. Please refer to Figures 2-5, 2-10, and 2-12 or your analyzer/transmitter instruction manual for electrical connections. The Model 389 ph/orp-02 is for use with a remote preamplifier. It comes with a special 15 ft low noise coax cable. Please refer to Figures 2-6, 2-7, 2-8, 2-9, 2-11, 2-13, 2-14, 2-15, 2-16, 2-17, and 2-18 for wiring information. DANGER DO NOT CONNECT SENSOR CABLE TO POWER LINES. SERIOUS INJURY MAY RESULT. WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH G FIGURE 2-5. Wiring Details Model with and without J-Box P/N

12 MODEL 389 SECTION C FIGURE 2-6. Wiring Details Model for use with Models 1054ApH/ORP-54, 1054BpH/ORP-54, and 2054pH-54 8

13 MODEL 389 SECTION E FIGURE 2-7. Wiring Details Model for use with Models 2081pH-05 and 1054pH/ORP-54 9

14 MODEL 389 SECTION D FIGURE 2-8. Wiring Details Model for use with J-Box (PN ) for remote preamp (PN ) D 10 FIGURE 2-9. Wiring Details Model /51 for use with J-Box (PN ) for remote preamp (3K TC)

15 MODEL 389 SECTION D FIGURE Wiring Details Model for use with Models 1054ApH/ORP-07, 1054BpH/ORP-07 and 2054pH-07 FIGURE Wiring Model ( ) to Model

16 MODEL 389 SECTION 2.0 WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH D FIGURE Wiring Details Model /51 with and without J-Box (PN ) 12

17 MODEL 389 SECTION C FIGURE Wiring Model to Model through Remote Junction Box B FIGURE Wiring Model to Model through Remote Junction Box (PN ) 13

18 MODEL 389 SECTION 2.0 WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH C FIGURE Wiring Details Model for use with Model 1181pH/ORP 14

19 MODEL 389 SECTION 2.0 WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH D FIGURE Wiring Details Model for use with Models 54/54e, 81, 3081, 4081, and 5081 Analyzers/Transmitters 15

20 MODEL 389 SECTION 2.0 WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH G FIGURE Wiring Details Model (PT100 RTD) for use with J-Box and Remote Preamp (P/N ) to Models 54/54e, 81, 3081, 4081, and 5081 Analyzers/Transmitters 16

21 MODEL 389 SECTION 2.0 WHEN INCH AND METRIC DIMS ARE GIVEN MILLIMETER INCH D FIGURE Wiring Details Model (PT100 RTD) for use with Remote Preamp (P/N ) 17

22 MODEL 389 SECTION 2.0 FIGURE Wiring Model to Model Xmt-P-HT-10 18

23 MODEL 389 SECTION 3.0 START UP AND CALIBRATION SECTION 3.0 START UP AND CALIBRATION 3.1 SENSOR PREPARATION. Shake down the sensor to remove any air bubbles that may be present at the tip of the ph glass bulb. In most cases, the ph sensor can simply be installed as shipped and readings with an accuracy of ± 0.2 ph may be obtained. To obtain greater accuracy or to verify proper operation, the sensor must be calibrated as a loop with its compatible analyzer or transmitter ph CALIBRATION. 1. After a temporary connection is established between the sensor and the instrument, a buffer calibration may be performed. 2. Consult appropriate ph/orp analyzer or transmitter instruction manual for specific calibration and standardization procedures, or see below for recommended two point buffer calibration procedure Recommended two point buffer calibration procedure: Select two stable buffer solutions, preferably ph 4.0 and 10.0 (ph buffers other than ph 4.0 and ph 10.0 can be used as long as the ph values are at least two ph units apart). Note: A ph 7 buffer solution reads a mv value of approx. zero, and ph buffers read approx. +/ mv for each ph unit above or below ph 7. Check the ph buffer manufacturer specifications for millivolt values at various temperatures since it may affect the actual value of the buffer solution mv/ph value. 1. Immerse sensor in the first buffer solution. Allow sensor to adjust to the buffer temperature (to avoid errors due to temperature differences between the buffer solution and sensor temperature) and wait for reading to stabilize. The value of buffer can now be acknowledged by analyzer/transmitter. 2. Once the first buffer has been acknowledged by the analyzer/transmitter, rinse the buffer solution off of the sensor with distilled or deionized water. 3. Repeat steps 1 and 2 using the second buffer solution. 4. Once the analyzer/transmitter has acknowledged both buffer solutions, a sensor slope (mv/ph) is established (the slope value can be found within the analyzer/transmitter). 5. The slope value should read about 59.1 mv/ph for a new sensor and will decrease over time to approximately mv/ph. Once the slope reads below the mv/ph range, a new sensor should be installed to maintain accurate readings Recommended ph Sensor Standardization For maximum accuracy, the sensor can be standardized on-line or with a process grab sample after a buffer calibration has been performed and the sensor has been conditioned to the process. Standardization accounts for the sensor junction potential and other interferences. Standardization will not change the sensor s slope but will simply adjust the analyzers reading to match that of the known process ph. 1. While obtaining a process solution sample (it is recommended that the sample is taken close to the sensor), record the ph value that is shown on the analyzer/transmitter display. 2. Measure and record the ph of the process solution sample with a another temperature compensated, calibrated ph instrument. For best results, standardization should be performed at the process temperature. 3. Adjust the analyzer/transmitter value to the standardized value. 19

24 MODEL 389 SECTION 3.0 START UP AND CALIBRATION 3.3 MODEL 389 ORP. Most industrial applications have a number of ORP reactions occurring in sequence or simultaneously. There can be several components that are oxidized or reduced by the reagents that are used. Theoretically, the ORP potential is absolute because it is the result of the oxidationreduction equilibrium. However, the actual measured potential is dependent on many factors, including the condition of the surface of the ORP platinum electrode. Therefore, the sensor should be allowed 1-2 hours to become conditioned to the stream when first set-up or after being cleaned Calibration 1. Make a temporary electrical connection between the sensor and the instrument. 2. Obtain a standard solution of saturated quinhydrone. This can be made quite simply by adding a few crystals of quinhydrone to either ph 4 or ph 7 buffer. Quinhydrone is only slightly soluble, but only a few crystals will be required (refer to Section for an alternate ORP standard solution). 3. Immerse the sensor in the standard solution. Allow 1-2 minutes for the ORP sensor to stabilize. 4. Adjust the standardize control of the transmitter to the solution value shown in Table 3-1. The resulting potentials, measured with a clean platinum electrode and saturated KCl/AgCl reference electrode, should be within ±20 millivolts of the value shown in Table 3-1. Solution temperature must be noted to ensure accurate interpretation of results. The ORP value of saturated quinhydrone solution is not stable over long periods of time. Therefore, these standards should be made up fresh each time they are used. 5. Remove the sensor from the buffer, rinse, and install in the process. TABLE 3-1. ORP of Saturated Quinhydrone Solution (In Millivolts) ph 4 Solution ph 7 Solution Temp C Millivolt Potential

25 MODEL 389 SECTION 4.0 MAINTENANCE SECTION 4.0 MAINTENANCE 4.0 Maintenance. The Model 389 Sensor is a disposable type sensor and therefore requires minimum maintenance. The sensor should be kept clean and free of debris and sediment at all times. The frequency of cleaning by wiping or brushing with a soft cloth or brush is determined by the nature of the solution being measured. The sensor should be removed from the process periodically and checked in buffer solutions. WARNING BEFORE REMOVING THE SEN- SOR, be absolutely certain that the process pressure is reduced to 0 psig and the process temperature is lowered to a safe level! 4.2 Automatic Temperature Compensator. The temperature compensator element is a temperature sensitive resistor and can be checked with an ohmmeter. Resistance increases with temperature. The 3K element will read 3000 ohms ± 1% at 25 C (77 F), and a Pt100 will read 110 ohms. Resistance varies with temperature for a 3K and Pt-100 element and can be determined according to Table 4-2 or the following formula: R T = R o [1 + R 1 (T-20)] Where R t = Resistance T = Temperature in C Refer to Table 4-1 for R o and R 1 values If the sensor will not calibrate, refer to your analyzer/ transmitter instruction manual for proper test procedures. If it is determined that the sensor has failed, it should be discarded and replaced. 4.1 Electrode Cleaning. If the electrode is coated or dirty, clean as follows: 1. Remove the sensor from process. 2. Wipe the glass bulb with a soft, clean, lint free cloth or tissue. If this does not remove the dirt or coating, go to Step 3 (detergents clean oil and grease; acids remove scale.) 3. Wash the glass bulb in a strong detergent solution, and rinse it in clean water. If this does not clean the glass bulb, go to Step 4. CAUTION The solution used during the following check is an acid and should be handled with care. Follow the directions of the acid manufacturer. Wear the proper protective equipment. Do not let the solution come in contact with skin or clothing. If contact with skin is made, immediately rinse with clean water. 4. Wash the glass bulb in a dilute 5% hydrochloric acid solution, and rinse with clean water. Soaking the sensor overnight in the acid solution can improve cleaning action. Replace the sensor if it cannot be cleaned. TABLE 4-1 R o and R 1 VALUES FOR TEMPERATURE COMPENSATION ELEMENTS Temperature Compensation Element R o R 1 3K PT TABLE 4-2 TEMPERATURE vs RESISTANCE OF AUTO T.C. ELEMENTS Resistance Temperature C (Ohms) ±1% 3K PT

26 MODEL 389 SECTION 4.0 MAINTENANCE 4.3 MODEL 389 ORP Platinum Electrode Check. The platinum electrode may be checked as follows. There are two types of standard solutions which may be used to check the ORP electrode/transmitter system: Cleaning Platinum Electrode. The electrode can be restored to normal operation by simply cleaning the platinum electrode with baking soda. Polish it by rubbing it with a damp paper towel and baking soda until a bright, shiny appearance is attained. Type 1: One type of commonly used ORP standard solution is the saturated quinhydrone solution. Refer to Section 3.3. CAUTION The solution used during the following check is an acid and should be handled with care. Follow the directions of the acid manufacturer. Wear the proper protective equipment. If contact with skin of clothing is made, immediately rinse with plenty of clean water. Type 2: A second ORP standard solution can be prepared from the following recipe: Dissolve 39.2 grams of reagent grade ferrous ammonium sulfate, Fe(NH 4 ) 2 (SO 4 ) 2 6H 2 O and 48.2 grams of reagent grade ferric ammonium sulfate, FeNH 4 (SO 4 ) 2 12H 2 O, in approximately 700 milliliters of water (distilled water is preferred, but tap water is acceptable). Slowly and carefully add 56.2 milliliters of concentrated sulfuric acid. Add sufficient water to bring the total solution volume up to 1000 ml. This standard ORP solution, although not as simple to prepare as the quinhydrone recipe, is much more stable, and will maintain its millivolt value for approximately one year when stored in glass containers. This solution (ferric/ferrous ammonium sulfate) will produce a nominal ORP of mv at 25 C when used with a saturated KCl/AgCl reference electrode and platinum measuring electrode. Some tolerance in mv values is to be expected due to the rather large liquid reference junction potentials that can arise when measuring this strongly acidic and concentrated solution. However, if the measuring electrodes are kept clean and in good operating condition, consistently repeatable calibrations can be carried out using this standard solution. 22

27 MODEL 389 SECTION 5.0 TROUBLESHOOTING SECTION 5.0 TROUBLESHOOTING TABLE 5-1. Troubleshooting Trouble Probable Cause Remedy Meter reads off scale (Display Defective preamplifier. Replace preamplifier (for code 02 reads overrange). sensors). For code 01, replace sensor. T.C. element shorted. Sensor not in process or sample stream is low. Open glass electrode. Reference element open - no contact. Check T.C. element as instructed in Section 4.2 and replace sensor if defective. Make sure sensor is in process with sufficient sample stream (refer to Section 2.0 for installation details). Replace sensor. Replace sensor. Display reads between 3 and 6 ph Electrode cracked. Replace sensor. regardless of actual ph of solution or sample. Meter or display indication swings T.C. element shorted. Check T.C. element as instructed or jumps widely in AUTO T.C. Mode. in Section 4.2 and replace sensor if defective. Span between buffers extremely T.C. element open. Check T.C. element as instructed short in AUTO T.C. Mode. in Section 4.2 and replace sensor if defective. Sluggish or slow meter indication Electrode coated. Clean sensor as instructed in for real changes in ph level. Sections 4.1 or Replace sensor if cracked. Electrode defective. Replace sensor. Transmitter cannot be standardized. Electrode coated or cracked. Clean Sensor as instructed in Sections 4.1 or and, if cracked, replace sensor. Defective preamplifier. Replace preamplifier. Transmitter short spans between Old glass electrode or high Replace sensor. two different buffer values. temperature exposure. Coated glass. Clean Sensor as instructed in Sections 4.1 or Replace sensor if cracked. 23

28 MODEL 389 SECTION 5.0 TROUBLESHOOTING TABLE 5.2. Model 389 ph/orp Replacement Parts and Accessories P/N DESCRIPTION QUANTITY Sensor Handrail Mounting Assembly Flow Cell, CPVC, 1 in. FNPT Mounting Adapter, Insertion, 1-1/4 in. MNPT (304 S.S.) X 3/4 in. FNPT (PEEK) Junction Box, for remote preamplifier Codes-50 and Junction Box, for remote preamplifier Code Cable, Extension (Prepped) for Model 54pH/ORP Only Preamplifier and Junction Box (NEMA 4X) For Model Sensor and Model 54pH/ORP Analyzer Preamplifier (Remote) For Model Sensor, J-Box and Model 54pH/ORP Analyzer Preamplifier, Plug-in, 1003 Compatible (for Code 02-51) Preamplifier, Plug-in, 1181/1050 Compatible (for Code 02-50) Preamplifier, Plug-in, 1054, 1054A, 2081 Compatible (for Code 02-54) Junction Box, w/o Preamp Adapter Insert, PEEK, 1 X 3/4 in., for Shroud, PVC Cable, 4 conductor, 22AWG, 2 pairs shielded (unprepped) Cable, Extension (Unprepped) for Model 54pH/ORP Only Buffer Solution, 4.01pH, 16 oz Buffer Solution, 6.86pH, 16 oz Buffer Solution, 9.18pH, 16 oz Union, Kynar Union, CPVC R Z ORP solution, 460 mv ± 10 at 20 24

29 MODEL 389 SECTION 6.0 RETURN OF MATERIAL SECTION 6.0 RETURN OF MATERIAL 6.1 GENERAL. To expedite the repair and return of instruments, proper communication between the customer and the factory is important. The Return of Materials Request form is provided for you to copy and use in case the situation arises. The accuracy and completeness of this form will affect the processing time of your materials. Call Tel. No for a Return Materials Authorization (RMA) number. 6.2 WARRANTY REPAIR. The following is the procedure for returning instruments still under warranty. 1. Contact the factory for authorization. 2. Complete a copy of the Return of Materials Request form as completely and accurately as possible. 3. To verify warranty, supply the factory sales order number or the original purchase order number. In the case of individual parts or sub-assemblies, the serial number on the unit must be supplied. 4. Carefully package the materials and enclose your Letter of Transmittal and the completed copy of the Return of Materials Request form. If possible, pack the materials in the same manner as it was received. IMPORTANT Please see second section of Return of Materials Request Form. Compliance to the OSHA requirements is mandatory for the safety of all personnel. MSDS forms and a certification that the instruments have been disinfected or detoxified are required. 5. Send the package prepaid to: Rosemount Analytical Inc. Uniloc Division 2400 Barranca Parkway Irvine, CA Attn: Factory Repair RMA No. Mark the package: Returned for Repair Model No. 6.3 NON WARRANTY REPAIR. 1. Contact the factor for authorization. 2. Fill out a copy of the Return of Materials Request form as completely and accurately as possible. 3. Include a purchase order number and make sure to include the name and telephone number of the right individual to be contacted should additional information be needed. 4. Do Steps 4 and 5 of Section 6.2. NOTE Consult the factory for additional information regarding service or repair. 25

30 RETURN OF MATERIALS REQUEST IMPORTANT! This form must be completed to ensure expedient factory service. C U ST O M ER N O TI C E T O FROM: RETURN BILL TO: S E N D E R CUSTOMER/USER MUST SUBMIT MATERIAL SAFETY SHEET (MSDS) OR COMPLETE STREAM COMPOSITION, AND/OR LETTER CERTIFYING THE MATERIALS HAVE BEEN DISINFECTED AND/OR DETOXIFIED WHEN RETURNING ANY PROD- UCT, SAMPLE OR MATERIAL THAT HAVE BEEN EXPOSED TO OR USED IN AN ENVIRONMENT OR PROCESS THAT CON- TAINS A HAZARDOUS MATERIAL ANY OF THE ABOVE THAT IS SUBMITTED TO ROSEMOUNT ANALYTICAL WITHOUT THE MSDS WILL BE RETURNED TO SENDER C.O.D. FOR THE SAFETY AND HEALTH OF OUR EMPLOYEES. WE THANK YOU IN ADVANCE FOR COMPLIANCE TO THIS SUBJECT. SENSOR OR CIRCUIT BOARD ONLY: (Please reference where from in MODEL / SER. NO. Column) 1. PART NO. 1. MODEL 1. SER. NO. 2. PART NO. 2. MODEL 2. SER. NO. 3. PART NO. 3. MODEL 3. SER. NO. 4. PART NO. 4. MODEL 4. SER. NO. R E A S O N F O R R E T U R N PLEASE CHECK ONE: REPAIR AND CALIBRATE EVALUATION DEMO EQUIPMENT NO. OTHER (EXPLAIN) REPLACEMENT REQUIRED? YES NO DESCRIPTION OF MALFUNCTION: R E P A I R S T A T U S WARRANTY REPAIR REQUESTED: YES-REFERENCE ORIGINAL ROSEMOUNT ANALYTICAL ORDER NO. CUSTOMER PURCHASE ORDER NO. NO-PROCEED WITH REPAIRS-INVOICE AGAINST P.O. NO. NO-CONTACT WITH ESTIMATE OF REPAIR CHARGES: LETTER PHONE NAME PHONE ADDRESS ZIP RETURN AUTHORITY FOR CREDIT ADJUSTMENT [Please check appropriate box(s)] WRONG PART RECEIVED DUPLICATE SHIPMENT REPLACEMENT RECEIVED REFERENCE ROSEMOUNT ANALYTICAL SALES ORDER NO. RETURN FOR CREDIT RETURN AUTHORIZED BY: WARRANTY DEFECT Emerson Process Management Rosemount Analytical Inc Barranca Parkway Irvine, CA USA Tel: (949) Fax: (949) Rosemount Analytical Inc. 2001

31 WARRANTY Seller warrants that the firmware will execute the programming instructions provided by Seller, and that the Goods manufactured or Services provided by Seller will be free from defects in materials or workmanship under normal use and care until the expiration of the applicable warranty period. Goods are warranted for twelve (12) months from the date of initial installation or eighteen (18) months from the date of shipment by Seller, whichever period expires first. Consumables, such as glass electrodes, membranes, liquid junctions, electrolyte, o-rings, catalytic beads, etc., and Services are warranted for a period of 90 days from the date of shipment or provision. Products purchased by Seller from a third party for resale to Buyer ("Resale Products") shall carry only the warranty extended by the original manufacturer. Buyer agrees that Seller has no liability for Resale Products beyond making a reasonable commercial effort to arrange for procurement and shipping of the Resale Products. If Buyer discovers any warranty defects and notifies Seller thereof in writing during the applicable warranty period, Seller shall, at its option, promptly correct any errors that are found by Seller in the firmware or Services, or repair or replace F.O.B. point of manufacture that portion of the Goods or firmware found by Seller to be defective, or refund the purchase price of the defective portion of the Goods/Services. All replacements or repairs necessitated by inadequate maintenance, normal wear and usage, unsuitable power sources, unsuitable environmental conditions, accident, misuse, improper installation, modification, repair, storage or handling, or any other cause not the fault of Seller are not covered by this limited warranty, and shall be at Buyer's expense. Seller shall not be obligated to pay any costs or charges incurred by Buyer or any other party except as may be agreed upon in writing in advance by an authorized Seller representative. All costs of dismantling, reinstallation and freight and the time and expenses of Seller's personnel for site travel and diagnosis under this warranty clause shall be borne by Buyer unless accepted in writing by Seller. Goods repaired and parts replaced during the warranty period shall be in warranty for the remainder of the original warranty period or ninety (90) days, whichever is longer. This limited warranty is the only warranty made by Seller and can be amended only in a writing signed by an authorized representative of Seller. Except as otherwise expressly provided in the Agreement, THERE ARE NO REPRESENTATIONS OR WARRANTIES OF ANY KIND, EXPRESS OR IMPLIED, AS TO MERCHANTABILITY, FIT- NESS FOR PARTICULAR PURPOSE, OR ANY OTHER MATTER WITH RESPECT TO ANY OF THE GOODS OR SERVICES. RETURN OF MATERIAL Material returned for repair, whether in or out of warranty, should be shipped prepaid to: Emerson Process Management Liquid Division 2400 Barranca Parkway Irvine, CA The shipping container should be marked: Return for Repair Model The returned material should be accompanied by a letter of transmittal which should include the following information (make a copy of the "Return of Materials Request" found on the last page of the Manual and provide the following thereon): 1. Location type of service, and length of time of service of the device. 2. Description of the faulty operation of the device and the circumstances of the failure. 3. Name and telephone number of the person to contact if there are questions about the returned material. 4. Statement as to whether warranty or non-warranty service is requested. 5. Complete shipping instructions for return of the material. Adherence to these procedures will expedite handling of the returned material and will prevent unnecessary additional charges for inspection and testing to determine the problem with the device. If the material is returned for out-of-warranty repairs, a purchase order for repairs should be enclosed.

32 The right people, the right answers, right now. ON-LINE ORDERING NOW AVAILABLE ON OUR WEB SITE Specifications subject to change without notice. Credit Cards for U.S. Purchases Only. Emerson Process Management Liquid Division 2400 Barranca Parkway Irvine, CA USA Tel: (949) Fax: (949) Rosemount Analytical Inc. 2005